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Northwest Africa 4874
Basic information Name: Northwest Africa 4874
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4874
Observed fall: No
Year found: 2007
Country: Algeria
Mass:help 28 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 49 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 4874

Algeria

Find: 2007

Achondrite (brachinite)

History and Physical characteristics: A 28 g nearly complete single stone was purchased in Erfoud, Morocco, in 2007. The stone is partially crusted and has a low degree of surface weathering with limonitic staining.

Petrography: (T. Bunch and J. Wittke, NAU) Dunitic rock with a medium-grained (mean size = 0.6 mm) protogranular texture. Mineral modes (vol%): olivine = 90; Ca-pyroxene = 4; chromite = 3; plagioclase = 2; merrillite =1 and metal = 1.

Mineral compositions: Olivine is very homogeneous at (Fa34.1; FeO/MnO = 80). Augite (Fs12Wo48.3), plagioclase (An40.7), metal (Ni = 3.15 wt%) and chromite (Cr/(Cr + Al) = 0.73).

Classification: Achondrite (brachinite); moderate shock.

Type specimens: A total of 6 g is on deposit at NAU. Aaronson holds the main mass.

Submitted by: T. Bunch, NAU.

Data from:
  MB93
  Table 2
  Line 140:
Place of purchase:Erfoud, Morocco
Date:2007
Class:Brach
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 979 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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